gismu rafsi: sim si'u x1 (set) has members who mutually/reciprocally x2 (event [x1 should be reflexive in 1+ sumti]). Members of x1 do to each other/one another x2, and in return do x2; x1 (plural set) do the same thing x2 to each other. See also kampu, mintu.

gismu rafsi: sis x1 seeks/searches/looks for property x2 among set x3 (complete specification of set). If searching for an object or an event, use tu'a in x2. See also cirko, kalte, kavbu, kucli, rivbi, manci, facki.

gismu rafsi: siv x1 is private/personal/privy/[secret/confidential/confined] to x2; x1 is not-public/hidden. Also: x1 is secret (one sense); x2 is in the know/in touch with/privy to x1 (= selsivni for reordered places); exclusion can be expressed by na'e(bo) in x2: excluded/in the dark (= nalselsivni). See also gubni, mipri.

gismu rafsi: sli x1 oscillates at rate/frequency x2 through set/sequence-of-states x3 (complete specification). Also (expressible either with desku or slilu): side to side, to and from, back and forth, reciprocal (motion), rotates, revolves. See also dikni, rilti, morna, desku, janbe, boxna.

gismu rafsi: sol x1 is the sun of home planet x2 (default Earth) of race x3; (adjective:) x1 is solar. 'home planet' refers to a planet which is "home" to a race, but not necessarily the original "home" of a species if that species inhabits many worlds. See also gusni, lunra, mluni, plini, santa, terdi, tarci.

gismu rafsi: ra'a x1 pertains to/is germane/relevant to/concerns/is related/associated with/is about x2. Also: x1 is a question of/treats of x2; can be symmetric, although x1 is conventionally more specific or constrained in scope than x2. See also cmavo list ra'a, ckini, ponse, steci.